Irregardless. That's redundant. You're pretty much saying, "Regardful," which is also not a word. The correct word is, "Regardless."

This is one that annoys the hell out of me, thank you for mentioning it! I was in a production of "A Little Night Music" recently and one of the girls in the show consistently said, "Irregardless of their matrimonial obligations" instead of "regardless of..." I would cringe every single time that line was uttered.

Webster's says it's a word, but "nonstandard"... representing an intensification of the absense of "regard" for the matter at hand.

it's spelled like a word, but the way i say it, my boyfriend always yells at me and says "That's not a word!"... ("Qupon" "Kyoopon" lol)he's an english major... so he gets annoyed with things i say all the time.

also i hate when people say things in real life they way you would text something, as if it's a word. like "OhEmGee".